Transcript for Pastor Rick Warren Returns to Pulpit First Time Since Son's Suicide

return to the church for pastor rick warren, back after losing his son to suicide. In his first sermon this sunday, he addressed that loss, saying that this country should work to erase the sig stigma of mental illness. Here's abc's clayton sandell. Reporter: Wiping back tears, pastor rick warren and his wife kay were back at the pulpit of their southern california megachurch. Love you, too. Reporter: For the first time, sharing how faith and hope were severely tested by their son's death. Not for one second did god forsake my son. Not for one moment has god forsaken me. Reporter: In april, 27-year-old matthew warren committed suicide. He battled mental illness his entire life. For 27 years, I prayed every day of my life for god to heal my son's mental illness. It just didn't make sense why this prayer was not being answered. But I would rather walk with god and have my questions unanswered than have all my questions answered and not walk with god. Reporter: Moving forward warren says he wants to channel his grief into fighting the stigma of mental illness. Your illness is not your identity. Your chemistry is not your character. Reporter: Many of warren's 20,000 followers have faith he can do it. Satan picked the wrong team He just really did. Reporter: Clayton sandell, abc news, denver.

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